Heavy-duty hammer



Jan. 30, 1923.

. P KANYGIN HEAVY DUTY HAMMER.

FILED MAY 25. I921.

IIVV NTOR dz A TTORNEY Patented Jan. 30, 1923.

UNITED STATE PATENT OFFICE.

HEAVY-DUTY HAMMER.

Application filed May 25,

To all whom it may concern:

Be it known that 1, PETER KANYGIN, a citizen of Russia, residing at Brilliant, in the Province of British Columbia and Dominion of Canada, have invented certain new and useful Improvements in Heavy-Duty Hammers, of which the following is a specification.

The main object of this invention is the provision of a drop hammer having provision for striking a heavy blow such as is necessary for some work.

The above and other objects will become apparent in the description below, in which like-named characters of reference refer'to like-named parts in the drawings, in which- Fig. 1 is a front elevational view of the hammer.

Fig. 2 is a side elevational view of th same.

Referring now in detail to the drawings, the numeral 1 represents a shaft rigidly supported by brackets 2 secured to the ceiling.

' A clutch 3 is slidably and rotatably mounted on said shaft, as is also a drum 4 adjacent said clutch, the latter being adapted to frictionally engage the former so as to lock both together.

A pulley 5 is rigid with one end of the drum 4, and is connected with a second pulley 6 by a belt 7. The pulley 6 is mounted rigidly on a shaft 8 supported in bearings 9. A drive pulley 10 is rotatably, but not slidably, mounted on the shaft 8, adjacent a clutch 11 rigid upon the shaft 8, said shaft being slidable in its bearings. A member 12, having a finger 13 and a lever handle 15 integral therewith as shown, is pivotally mounted upon a support 16, said finger 13 lying in engagement with a peripheral slot 14 on the clutch 11.

A rod 17 is pivotally secured to the member 12, and extends upwardly, having secured near its upper extremity a lever 18 which is pivotally mounted at 19 and has a finger 20 at its free end. The upper extremity of the rod 17 is secured to a bellcrank lever 21, pivotally mounted at 22, and having an arm 23 engaging with a peripheral slot 24 on the hub of clutch 3.

A cable 25 is wound upon the drum 4, and has secured to its extremity a heavy hammer tup 26 slidably mounted in an upright guide 27 supported above an anvil 28, and a trip 1921. Serial No. 472,499.

29 is secured to said cable just above the hammer.

Assuming the relative positions of the parts of the device to be those shown in heavy lines in Fig. 1, it is apparent that the clutch 3 is locked, the clutch 11 open, and the hammer 26 is in mid position. Now, in order to have the hammer tup 26 strike the anvil 28, the lever 15 is depressed into the dotted position shown, raising the rod 17 and turning the lever 18 and member 21 slightly in a clockwise direction. Thereupon the finger 13 will slide the clutch 11 into locked engagement with the driving pulley 10 (which is driven by a belt not shown), thus causing the shaft 8 to rotate. At the same time the arm 23 has withdrawn the clutch 3 from engagement with the drum 4 permitting the hammer tup to drop, and the belt 7, actuated by the pulley 6 on the shaft 8, will drive the pulley 5 and wind up the cable 25 on the drum 4, thus quickly raising the tup. As the trip 29 rises it strikes the finger 20 of the lever 18, tripping the latter and causing the rod 17 to descend to its original position, thereby disengaging the driving pulley 10 from the mechanisnn and locking the clutch 3 against the drum 4. The last named operation will help to bring the drum 4 to a sudden stop. Continued intermittent depression of the lever 15 will continue the operation described.

Thus it is apparent that I have provided an efficient heavy duty trip hammer, simple and safe in operation and relatively inexpensive in cost of manufacture.

I claim:

A drop hammer comprising an anvil, a hammer tup, a pair of shafts arranged in diiferent planes, a clutch and driving pulley on the lower of said shafts, a second clutch and driven pulley on the upper shaft, a drum associated with the last named pulley, a cable secured at its ends respectively to said hammer tup and drum, a trip on said cable, bell-crank levers serving each clutch, a rod connecting between said bell-crank levers, a lever for shifting said rod, said lever being operated by said trip and a manually operable lever engaging. said rod for actuating said rod..

In witness whereof I affix my signature.

PTTER KANYGIN. 

